Yahoo! KeyKey[1] is a customized Chinese input methods tool based on an open source project Openvanilla[2].

Yahoo! had decided to make Yahoo! Keykey as a open source projecet and under new BSD licene.

Some external dependency information are list here:
1.SinicaCorpus: You could reach https://www.sinica.edu.tw/ for the license.
2.BPMFMappings was created based on SinicaCorpus.
3.YahooSearchTerms: You could grabe hot keyword from https://tw.yahoo.com.
4.sqlite-cerod-see: Commerical SQLite Compressed and Encrypted Read-Only Database (CEROD) Extension, please check https://www.hwaci.com/sw/sqlite/cerod.html
5.DotMacKit.framework and PackageMaker.app: You can get it from Apple development kit.

[1]. https://tw.media.yahoo.com/keykey/
[2]. https://openvanilla.org/